JPH0611459Y2 - Tweezers type probe - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a tweezers type probe, and more specifically, it holds a minute device to be measured for measurement, or a minute measured device required for measurement. The present invention relates to a tweezers type probe so that contacts of probe terminals used in contact with points can always face each other in a correct positional relationship.

[Prior Art] Tweezers type probes are
By integrally connecting the pair of probe parts in a substantially V shape,
The probe terminals used when contacting the measured point are formed in a state in which the contact elements of the probe terminals are pre-energized in the opening direction, and such a structure is suitable for low resistance measurement, for example. It has already been provided as a four-terminal probe used in the so-called four-terminal method.

The tweezers type probe thus used can apply a clamping force to the contacts of the probe terminals in the facing positional relationship by pressing while holding the center portion of the probe type. By this clamping force, it is possible to clamp a device to be measured such as a minute resistance element or to bring the contactor into contact with the measured point to perform a required measurement.

Further, the tweezers type probe is usually formed under a structure in which probe terminals are housed and fixed in a casing.

[Problems to be Solved by the Invention] In the tweezers-type probe, when the casing is made of a metal material having high rigidity, a lateral twist occurs during the operation, and the facing relationship between the contacts is increased. It is relatively unlikely that will be displaced.

However, as a result of emphasizing weight reduction, easiness of processing, and low cost, a lot of those in which the casing of the tweezers type probe is formed using a non-metal material such as a synthetic resin are recently provided. Has arrived. Thus, when using a non-metallic material such as synthetic resin as the casing of the tweezers probe,
When the measured point or the like of the element to be measured is sandwiched by the contact terminals of the probe terminal with a relatively large pressing force, inconvenience tends to occur as compared with the case where it is formed of a metal material. In other words, although the contactors should originally sandwich each other in the correct positional relationship, since the casing itself is inferior in rigidity, a twisting phenomenon occurs in the lateral direction between the contactors, and the contactors are once sandwiched. In many cases, inconveniences have occurred in that the minute element to be measured is flipped off, or the contact cannot be brought into contact with the correct point to be measured of the element to be measured.

In view of the above inconvenience that occurs when the casing of the tweezers type probe is formed of a non-metallic material such as a synthetic resin, the present invention makes it possible to maintain a precise positional relationship between the facing contacts. It is an object of the present invention to provide a tweezers-type probe that can securely hold a device under test and can also reliably contact a fine measurement point.

[Means for Solving the Problems] This invention is intended to achieve the above object,
Its structural feature is that a probe terminal having a contact protruding from the tip is housed, and a substantially V shape is formed via a connecting portion located on the base end side so that the tip can be opened and closed with respect to each other. Each of the pair of casings that is operably connected includes:
By providing a sliding contact guide portion having a portion capable of sliding contact with each other on the inner side surfaces of the side wall portions of the mating casings, and regulating the position between the sliding contact guide portion and the side wall portion. ,
It is always possible to maintain the face-to-face relationship between the contacts.

[Operation] For this reason, when it is attempted to pinch a small element to be measured through the contacts of the probe terminal or to bring it into contact with the point to be measured, the element is provided in each of the casings. By sliding the sliding contact guide part through the inner side surface of the side wall part on the other side, it is possible to operate in the closing direction while restricting the position. Therefore, the probe terminals housed and fixed in these casings are also It is possible to reliably hold the element to be measured or bring it into contact with the point to be measured under a state where the contactors face each other in a correct positional relationship.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an overall front view showing an embodiment in which the present invention is applied to a tweezers type four-terminal probe, and a pair of casings 1 and 1 symmetrically arranged has tip ends respectively. A probe 22 is housed and fixed by projecting a contact 22 from the portion 2. Further, these casings 1 are connected to each other in a substantially V-shape that allows the front end portions 2 to be opened and closed by way of a connecting portion 3 located on the base end side thereof.

Further, in each of the pair of casings 1, 1,
As is clear from the bottom view shown in FIG. 3, there is formed a sliding contact guide portion 6 having a portion capable of always sliding contact with the inner side surface 5 of the side wall portion 4 of the counterpart casing 1. The sliding contact guide portion 6 is provided on the side wall portion 4 of the counterpart casing 1.
The positional relationship between the contact elements 22 is regulated by slidingly contacting the inner surface 5 thereof, so that the facing relationship between the contact elements 22 can always be maintained.

FIG. 2 clarifies the internal structure of the casing 1 shown in FIG. 1, and the probe terminal 21 formed in a plate shape is housed and fixed in the casing 1 by projecting the contact 22. Has been done.

Each of these casings 1 includes a bottom wall portion 7, side wall portions 4 erected along both sides of the bottom wall portion 7 in the longitudinal direction, and one of the side wall portions 4 on one side. It has a sliding contact guide portion 6 standing upright inside and is integrally formed of a synthetic resin material in a substantially boat shape.

Further, the inner bottom surface 8 of the casing 1 surrounded by the bottom wall portion 7 and the left and right side wall portions 4 is provided on the mating casing 1 on the inner side surface 5 side of the side wall portion 4 located on the left side thereof. A partition wall portion 10 is provided upright along the side wall portion 4 so as to form a groove portion 9 for accommodating the upper end portion of the sliding contact guide portion 6 which is formed. Further, a connecting portion 11 is integrally erected upright at an appropriate interval between the partition wall portion 10 and the sliding contact guide portion 6, and the protruding fastening attachment projection portion 12 is heated. By crimping or the like, the probe terminal 21 can be housed and fixed in a non-contact state with the inner bottom surface 8.

FIG. 4 and FIG. 5 are cross-sectional views showing a state in which the casing 1 is engaged with each other when the casing 1 is opened and closed. Each of the branched core wires 31 has a soldering portion 32 for each probe terminal 21. As a result, they are electrically connected and are combined with each other.

Of these, FIG. 4 shows an open state in which the pressing force on the casings 1 is released, and in this case, the sliding contact guide portion 6 erected on the casing 1 on one side is It is formed so as to be able to always maintain a slidable contact state with the inner side surface 5 of the side wall portion 4 of the casing 1 of the other side at a part, specifically, a portion located on the side of the connecting portion 3. .

Further, FIG. 5 shows a closed state in which the casings 1 are pressed against each other. In this case, the sliding contact guide portion 6 erected on the casing 1 on one side extends over the entire length of the casing on the other side. Since the sliding contact state with the inner side surface 5 of the side wall portion 1 of the probe terminal 21 is maintained, the face-to-face relationship between the contactors 22 of the probe terminal 21 can be more reliably maintained.

In the figure, reference numeral 33 indicates a pillar member that fixes the casings 1 to each other, and 34 indicates a cord.

Since this device is constructed as described above,
Even when the casings 1 and 1 are not in use, in which no pressing force is applied to each other, that is, in the state shown in FIG. 1 or 4, the sliding contact guide portion 6 provided on the casing 1 on one side.
Part of the groove portion 9 of the casing 1 on the other side is always
The sliding contact guide portion 6 provided on the casing 1 on the other side.
Part of the groove 9 of the casing 1 on one side is always
In addition, it can be housed while being in sliding contact with the inner side surface 5 of each side wall portion 4.

Further, in the use state in which the casings 1 and 1 are pressed against each other in use, that is, in the state shown in FIG. 5, each of the sliding contact guide portions 6 extends over the entire length thereof and the other side casing. Since it can be housed in the groove portion 9 while being in sliding contact with the inner side surface 5 of the side wall portion 4 of No. 1, the contacts 22 of the probe terminals 21 housed and fixed in the casing 1 are always correct. They can be face-to-face in a positional relationship.

Therefore, even when a small element to be measured is sandwiched via the contactor 22 or when an attempt is made to make contact with a minute point to be measured, these contactors 22 are twisted in alternate lateral directions. It is possible to prevent deformation, and it is possible to prevent inconvenience such as flipping the device under test.

[Advantage of the Invention] As described above, according to the present invention, even if a pair of casings forming the tweezers type probe is formed of a synthetic resin material having poor rigidity and flexibility, each casing has Since there is a sliding contact guide that can regulate the position with the mating casing, even if these casings are pressed in the closing direction, they must always be correctly faced to each other. The positional relationship can be maintained, and even a small element to be measured can be reliably sandwiched via the contactor or can be brought into contact with the point to be measured.

In addition, the pair of casings can be formed by mutually combining the same shapes in a state of being bilaterally symmetrical, which can contribute to reduction of product cost.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a right side view showing its internal structure, FIG. 3 is a bottom view of FIG. 1, and FIG. FIG. 5 is a longitudinal sectional view of FIG.
It is a longitudinal cross-sectional view at the time of making a figure into a closed state. DESCRIPTION OF SYMBOLS 1 ... Casing, 2 ... Tip part, 3 ... Base end part, 4 ... Side wall part, 5 ... Inner side surface, 6 ... Sliding contact guide part, 7 ... Bottom wall part, 8 ... Inner bottom surface, 9 ... Groove part, 10 ... Partition wall Part, 11 ... connecting part, 12 ... fixing projection part, 21 ... probe terminal, 22 ... contactor

Claims (1)

[Scope of utility model registration request] 1. A probe terminal, in which a contact is projected from a tip end portion, is accommodated, and is formed into a substantially V shape through a connecting portion located on a base end portion side so that the tip end portions can be opened and closed. Each of the pair of casings connected to each other is provided with a sliding contact guide portion having a portion capable of always sliding contact with the inner side surface of the side wall portion of the mating casing. A tweezers-shaped probe characterized in that it is possible to always maintain a facing relationship between the contacts by controlling the position between the contact and the side wall portion.